/*
 * Copyright 2021 DataCanvas
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package io.dingodb.calcite.grammar.ddl;

import org.apache.calcite.sql.SqlIdentifier;
import org.apache.calcite.sql.SqlKind;
import org.apache.calcite.sql.SqlOperator;
import org.apache.calcite.sql.SqlSpecialOperator;
import org.apache.calcite.sql.SqlWriter;
import org.apache.calcite.sql.parser.SqlParserPos;

public class SqlFlashBackSchema extends SqlFlashBack {

    public SqlIdentifier schemaId;
    public SqlIdentifier newSchemaId;
    public String newSchemaName;

    private static final SqlOperator OPERATOR =
        new SqlSpecialOperator("FLASHBACK SCHEMA", SqlKind.OTHER_DDL);

    public SqlFlashBackSchema(SqlParserPos pos, SqlIdentifier schemaId, SqlIdentifier newSchemaId) {
        super(OPERATOR, pos);
        this.schemaId = schemaId;
        this.newSchemaId = newSchemaId;
        if (newSchemaId != null) {
            if (newSchemaId.names.size() > 1) {
                this.newSchemaName = newSchemaId.names.get(1);
            } else {
                this.newSchemaName = newSchemaId.names.get(0);
            }
        }
    }

    @Override
    public void unparse(SqlWriter writer, int leftPrec, int rightPrec) {
        writer.keyword("FLASHBACK SCHEMA ");
        schemaId.unparse(writer, leftPrec, rightPrec);
    }
}
